ADL5605ACPZ-R7 datasheet(14/20 Pages) AD

14 / 20 page

ADL5605

Rev. 0 | Page 14 of 20

ADL5605 MATCHING

The RF input of the ADL5605 can be easily matched to 50 Ω

with at most one external component and the microstrip line

used as an inductor. The RF output requires one series inductor,

one shunt capacitor, and the microstrip line used as an inductor.

Table 6 lists the required matching component values. Capac-

itors CIN and COUT are Murata GRM155 series (0402 size), and

Inductor L2 is a Coilcraft® 0603CS series (0603 size).

For all frequency tuning bands, the placement of CIN, L2, and

COUT is critical. Table 7 lists the recommended component

spacing for the various frequency tuning bands. The component

spacing is referenced from the center of the component to the

edge of the package.

Figure 32 to Figure 34 show the matching networks.

Table 6. Recommended Components for Basic Connections

Frequency (MHz)

CIN (pF)

L2 (nH)

COUT (pF)

728 to 768

2.4

2.7

12.0

868 to 894

N/A

1.6

8.0

925 to 961

N/A

1.6

8.0

Table 7. Matching Component Spacing

Frequency (MHz)

λ1 (mils)

λ2 (mils)

λ3 (mils)

728 to 768

94.5

169

868 to 894

N/A

94.5

268

925 to 961

N/A

94.5

240

RFOUT

RFIN

RFOUT

DISABLE

CIN

2.4pF

COUT

12pF

100pF

18nH

2.7nH

100pF

λ1

λ3

λ2

ADL5605

Figure 32. ADL5605 Match Parameters, 748 MHz Frequency Tuning Band

RFOUT

RFIN

RFOUT

DISABLE

CIN

OPEN

COUT

8pF

100pF

18nH

1.6nH

100pF

λ3

λ2

ADL5605

Figure 33. ADL5605 Match Parameters, 881 MHz Frequency Tuning Band

RFOUT

RFIN

RFOUT

DISABLE

CIN

OPEN

COUT

8pF

100pF

18nH

1.6nH

100pF

λ3

λ2

ADL5605

Figure 34. ADL5605 Match Parameters, 943 MHz Frequency Tuning Band

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